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write the usage of electromagnet......?
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- their use in loud speaker and headphones
2.also there are found in the electric bells
3. they are also used in Dc motors .
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two field lines whether it is electric field or magnetic field....they are vector quantities which means they have some magnitude but fixed direction......
that's why the two field lines never intersect....if they intersect one another then the point of intersection will have two directions which is not possible as every electric field has a fixed direction at a point......
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